That can be said for any program. If you change browsers, there's a learning curve. Updating from W7 to W10 involved a learning curve. If you simply update from Office 2010 to 2016, there's a learning curve. If you use a different screenshot program, there's a learning curve.

Windows Firewall like other FW programs, walks you through the steps to create a new rule. You don't have to be any sort of expert. And because Windows Firewall does not have a bunch of other fluff in it, the menu system is much less cluttered with potentially confusing stuff.